A Quick Trip Into theHuman Circulatory System

(also known as the Cardiovascular System)

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Picture from: http://www.emc.maricopa.edu/faculty/farabee/biobk/circsyscomp_2.gif

Oxygenated blood flows from the lungs to the pulmonary veins to the left atrium of the

heart, through the left ventricle, and out the aortic valve to the aorta, an artery which is

also the body’s largest blood vessel.

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• Unoxygenated blood flows from both the superior vena cava and the inferior vena cava into the right atrium, through the atrioventricular valve to the right ventricle and through the pulmonary valve to the pulmonary arteries where it is headed for the lungs to pick up some oxygen.

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Pulmonary Circulation

• The process of blood going from the heart to the lungs and back.

Systemic Circulation

• The process of blood going from the heart to the rest of the body and back.

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Capillaries• One of the most important parts of the

circulatory system, these tiny blood vessels deliver nutrients and oxygen to the cells while getting rid of waste products such as carbon dioxide.

Alveoli• These are tiny air sacs in the

lungs where oxygen exchange takes place.

Things that can go wrong with the heart:

• Congenital heart defects – defects that are present at birth which involve abnormal or incomplete development of the heart

• Arrhythmia – Irregularities in the heart’s rhythm• Coronary heart disease – caused by atherosclerosis

(fat, calcium, and dead cells are deposited in the walls of the coronary arteries), this is the most common type of heart disorder in adults.

• Hypertension – when a person’s blood pressure is significantly higher than normal…symptoms include headache, nosebleed, dizziness and lightheadedness

• Stroke – this occurs when the blood supply to the brain is cut off

Four steps to maintaining a healthy heart:

• 1. Getting plenty of exercise

• 2. Eating a nutritious diet

• 3. Maintaining a healthy weight

• 4. Getting regular medical checkups

QUIZ TIME!!!!!

I’m not ready yet

• What is the structure that blood goes through before entering the aorta?

• A. Pulmonary Valve

• B. Pulmonary Artery

• C. Aortic Valve

• D. Aortic ArteryAortic Artery

Aortic Valve

Pulmonary Artery

Pulmonary Valve

Question 1

• After leaving the right ventricle, unoxygenated blood goes through the _____________ into the _____________ and finally, to the lungs to pick up oxygen.

• A. Right atrium, pulmonary veins

• B.

• C.

• D. Pulmonary valve, pulmonary artery

Aortic valve, aortaLeft atrium, pulmonary artery

Right atrium, pulmonary veins

Question 2

• Unoxygenated blood flows through these two chambers of the heart:

• A.

• B. Right ventricle, left ventricle

• C. Right atrium, left atrium

• D. Left atrium, left ventricleLeft atrium, left ventricle

Right atrium, left atrium

Right ventricle, left ventricle

Right atrium, right ventricle

Question 3

• What is the name of the process of providing oxygen to the rest of the body (not including the lungs)?

• A.

• B.

• C.

• D. Pulmonary circulation

Systemic circulation

Anaerobic respiration

Aerobic respiration

Question 4

Question 5

• Tiny blood vessels that deliver nutrients and oxygen to cells while getting rid of waste products are called

• A.

• B.

• C.

• D.

venules

arterioles

alveoli

capillaries

Question 6

• Tiny air sacs in the lungs where oxygen exchange takes place are called

• A.

• B.

• C.

• D.

Arterioles

Venules

Capillaries

Alveoli

Question 7

• The most common type of heart disorder in adults caused by atherosclerosis is called

• A.

• B.

• C.

• D.

Arrhythmia

Stroke

Hypertension

Coronary Hearth Disease

Question 8

• A(n) ________ occurs when the blood supply to the brain is cut off

• A.

• B.

• C.

• D.

ArrhythmiaCongenital Heart Defect

Coronary Heart Disease

Stroke

Question 9

• How can you help maintain a healthy heart?

• A.

• B.

• C.

• D.

• E.

Getting plenty of exerciseEating a nutritious diet

Maintaining a healthy weight

Getting regular medical checkupsAll of the above

Resources• Image of capillaries: http://images.google.com/imgres?imgurl=http://www.kidsbiology.com/

images/cells-ciruclatory-system.jpg&imgrefurl=http://www.kidsbiology.com/human_biology/circulatory-system.php&h=200&w=300&sz=22&hl=en&start=64&tbnid=7g33WLF8Z4zMpM:&tbnh=77&tbnw=116&prev=/images%3Fq%3Dcirculatory%2Bsystem%26start%3D60%26ndsp%3D20%26svnum%3D10%26hl%3Den%26sa%3DN

• Image of alveoli: http://images.google.com/imgres?imgurl=http://www.greenfacts.org/images/glossary/bronchi-bronchioles-alveoli.jpg&imgrefurl=http://www.greenfacts.org/glossary/abc/bronchitis.htm&h=290&w=280&sz=17&hl=en&start=4&tbnid=NqSye37YpBVdEM:&tbnh=115&tbnw=111&prev=/images%3Fq%3Dalveoli%26gbv%3D2%26svnum%3D10%26hl%3Den%26sa%3DG

• All information about the circulatory system: http://www.kidshealth.org/parent/general/body_basics/heart.html

The End!Click button to exit module

Incorrect…

• Hint: It goes through an opening called a valve…

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Incorrect…

• Hint: It goes through a valve into a blood vessel that leads away from the heart.

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